10
DHY-03 User Handbook
Status & Operating Mode Information
The LED display is also used to indicate special operating modes and other settings
as follows:
.
Alternating 2 LEDs on, 2 LEDs off pattern indicates that the DHY-03 is checking the
status of the Line Connect Button to test the Bootstrap Mode (see page 24).
.
Alternating 4 LEDs on, 4 LEDs off pattern indicates that the DHY-03 has entered
Bootstrap mode, because either the Line Connect Button was held down for ~10
seconds at power up, or the Main code has been corrupted (most likely due to a
previous incomplete firmware update).
.
Alternating 8 LEDs on, 8 LEDs off pattern indicates that the DHY-03 has received a
‘DWN’ command from the serial port and is updating the firmware (valid in either
Bootstrap or Normal operation).
.
On normal power up the top row of LEDs shows the current country selection
(see table 2-1 with LEDs numbered from left to right reflecting the dipswitch settings).
The bottom row shows a chase pattern of 2 LEDs moving from left to right, followed
by the current hybrid pointer parameter value. This value is explained on page 24 and
the LEDs will show (from left to right) the Set (1 LED); the Entry in the table (3 LEDs)
and the Table (4 LEDs) currently being used.
.
If there is a fault during power up, the first and last LEDs on the bottom row will
alternately flash and the top row will show:-
-
LED1 (left most LED) indicates UART initialisation fault.
-
LED2 indicates Codec initialisation fault.
-
LED1+2 indicates Silab chipset initialisation fault.
-
LED3 indicates Silab front end failure.
-
LED1+3 indicates Silab telephony failure.
.
Once initialisation is complete the LEDs show the Bargraph info as above.
.
During Network Hybrid Calibration the bottom row of LEDs shows the current setting
of the hybrid select parameter being used.
.
When jumper 2 is fitted and the parameter is set to show the system status the
following info is indicated on the top row: -
-
LED1 (left most LED) lights to indicate that the network echo cancellation
is enabled.
-
LED2 lights to indicate that the acoustic echo cancellation is enabled.
-
LED3 lights to indicate both signals are too high for adaptation.
-
LED4 lights to indicate that the signal is in ‘hold off’ after last adaptation cycle.
-
LED5 lights to indicate that the signal from the analogue input is above the
threshold for adaptation.
-
LED6 lights to indicate that the signal from the telephone line is above the
threshold for adaptation.
-
LED7 is unused.
-
LED8 (right most LED) is always lit to indicate status mode.
C
ONFIGUR
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CONFIGURATION & CONTROLS
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